Alexander milne



(No Model.) T

A. MILLE. WATCH CASE SPRING.

No. 453,202. Y Patented June 2,1891.

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y UNITED STATES PATENT OEETCE.

ALEXANDER MILNE, OF NElVARK, NEV JERSEY, ASSIGNOR TO THE NEWARK IATCHCASE MATERIAL COMPANY, OF SAME PLACE.

WATCH-CASE SPRING.

SPECIFICATION forming part of Letters Patent No. 453,202, dated June 2,1891. Application led March 6, 1891. Serial No. 383,977. (No model.)

T @ZZ whom t may con/corn:

Be it known that I, ALEXANDER MILNE, a citizen of the'United States, anda resident of Newark, in the county of Essex and State of New Jersey,have invented certain new and useful Improvements in Witch-Case Springs,of which the following is a specification.

My invention relates to an improvement in watch-case springs, the objectbeing to xo provide an article of this kind so constructed that noslotting or boring of the spring will be necessary in pinning orotherwise securing it to the case-center.

tVith this end in View my invention conr5 sists in certain novelfeatures of construction and combinations of part-s, as will behereinafter fully described, and pointed out in the claims.

In the accompanying drawings, Figure l is 2o a view of a hunting-easewatch, the lid being open and a portion of the center broken away toexpose the spring. Fig. 2 is a sectional view thereof. Fig. 3 is a viewof the spring with grooved piece removed. vFig. 4

is a view of the spring with the piece insert-ed. Fig. 5 is a detachedview of the grooved block or piece of metal adapted to fit in the bendof the spring.

A represents a watch of the hunting-case 3o type, provided with thehinged lid B and ease-center C.

D represents the spring, made of a thin metal strip, curved to conformto the shape of the center and provided. at one end with the lock orcatch a, the spring illustrated beingthat known as the lock-spring; butI would have it understood that my invention is equally well adapted tobe used as a liftspring, the only dilference in construction 4o beingthe engaging end, which in such case is provided with a lug, thisfeature being well understood by those skilled in the art, and henceneed not be more fully described.

At some point in its length I bend the spring into the shape shown inFig. 3 of the drawings, the bend h being made outwardly, in order thatthe finished spring, when inserted in the case, may present a smoothandv Iinished inner surface. The bend l) I preferably form as shown-thatis, in the shape 5o of a dovetail-the object being to con'line withinthe bend a small metal piece or block E, made of a size and shape tonicely fit therein. The outer surface of this block or separable piece Eis provided with the vertical grooves of a size to receive a pin orscrew d, Fig. l, adapted to enter the casecenter and hold the springsecurely therein, the vertical edges ot' the piece being slightlyhollowed out, as at e, to lit over the bonded 6o corners of the spring,as shown in Figs. el, and 5.

It will be understood from this construction and arrangement ot partsthat instead of boring, corrugating, or slotting the body of the spring,and thereby necessarily weakening it, in order to pin or otherwisesecure it to the center the spring itself is left intact, the groovingoccurring in the separable piece, upon which little or no strain falls.I have 7o shown the block E provided with two grooves e, but one willanswer; or, if desired, three or more may be provided, as such willallow of a wider range in the case-center in which to bore the hole forthe reception of the lock- 7'5 ing-pin d. It will Ifurther be noticedthat instead of weakening the spring I rather add to its strength, asthe tendency of the bend h is to press against or bind the solidpiece,overcoming all danger of breaking at S thatpart.

If desired, a small pinjl may be passed through the spring into thepiece E for the purpose of preventing the latter from becomingseparated, as the spring does not bend 8 5 at such point, and hencethere is weakening effect therefrom.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. A watch-case spring provided with a bend at some point in its length,in combination with a grooved metal block or piece adapted to iit insaid bend, substantially asv Vset forth.

2. In a watch-case spring, the combination, with thc spring properconstructed with a bend, of a separable piece or block adapted ,f- 5With the spring proper D, provided with the to t in said bend andprovided with one or Signed :Lt New York, in the County of New morevertical grooves, Substantially as set York and State of New York, this'7th day of 1o forth. February, A. D. 1891.

3. In L Watch-oase spring, the combination, ALEXANDER MLNE bend b, ofthe piece E,1itting in said bend \Yitnesses: and provided with thevertical grooves e and BYRON P. STRATTON, c, substantially as set forth.WILLIAM GOEBEL.

